Games like Beyond the Horizon
Games like Beyond the Horizon include Journey, ABZU, GRIS, Chill with You : Lo-Fi Story, and A Short Hike. We matched them by the tags players give Beyond the Horizon on Steam (Adventure, Casual, Indie, Relaxing, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Journey
Shared: Adventure · Indie · Atmospheric

ABZU
Shared: Relaxing · Adventure · Atmospheric

GRIS
Shared: Indie · Adventure · Atmospheric

Chill with You : Lo-Fi Story
Shared: Casual · Relaxing · Atmospheric

A Short Hike
Shared: Adventure · Indie · Relaxing

Flower
Shared: Casual · Relaxing · Adventure

AER Memories of Old
Shared: Adventure · Indie · Relaxing

DAVE THE DIVER
Shared: Casual · Adventure · Relaxing

A Story About My Uncle
Shared: Adventure · Indie · Atmospheric

Superflight
Shared: Indie · Casual · Relaxing

The Last Campfire
Shared: Adventure · Indie · Atmospheric

Firewatch
Shared: Adventure · Atmospheric · Indie

Brothers - A Tale of Two Sons
Shared: Adventure · Indie · Atmospheric

The Gallery - Episode 1: Call of the Starseed
Shared: Adventure · Indie · Casual

Slime Rancher 2
Shared: Relaxing · Adventure · Casual

Carto
Shared: Indie · Adventure · Relaxing

Meadow - A Shelter Game
Shared: Adventure · Relaxing · Indie

Florence
Shared: Casual · Adventure · Indie

Moncage
Shared: Casual · Indie · Adventure

The First Tree
Shared: Adventure · Indie · Atmospheric

Glass Masquerade
Shared: Casual · Indie · Relaxing

Neva
Shared: Adventure · Indie · Atmospheric

Spirit of the North
Shared: Adventure · Casual · Atmospheric

Assemble with Care
Shared: Casual · Indie · Relaxing